Hmm kinda scary but serious ?!?

Vanna • 24-enjoy every moment in life 😊
Okay so recently one of my good friend found out her 2 year boyfriend is gay?!? (Like we never thought) he act, dress, talks like a straight guy!!! But I guess he had to put up with it so long he couldn't take it... But now this is making me wonder any "straight looking guy"could be gay or bi ... I'm not against it at all but this kinda scares me! Could my bf possibly be secretly gay? Now days it makes me question since I never thought my friends ex could never be gay. I mean my bf doesn't show any signs... But then again who knows huh? Any one experience this before? Or anyone knows any signs ? Thank u